Urban geotourism, considered to be an activity related to geology within cities, has been developing since the 1980s. Currently several cities around the world already have geotrails through their streets and squares, aimed at the dissemination of geoscientific concepts, being the essence of urban geotourism. Because of the ease of access and mobility, cities are suitable places for such activity, thus inducing a link with geotourism in natural areas. This topic is gradually becoming established in Brazil, notably in the city of São Paulo. Due to the intensive urban development of this megalopolis, it is not common to find natural outcrops, but it is very rich in the diversity of stones in the built heritage, especially in the old centre, in churches and in cemeteries. Being a geotourist in São Paulo is like browsing through a catalogue of dimension stones.